Just because someone put a laminate stock on a NEW or has SA stamped on the receiver doesn't make it rare. I have 2 of them both pristeen barrels blade sights, rear Finn sights with meters on one side and Russian markings on other. Never considered them rare.On all the m91 conversions I've seen, it was done by installing a sleeve made from the last few inches of a barrel with sight base still in place. You can barely see where it joins on my 1920 Tula.